Search and Destroy, Seek and Destroy, or even simply S&D, refers to a militarystrategy that became a large component of the Malayan Emergency and the Vietnam War. The idea was to insert ground forces into hostile territory, search out the enemy, destroy them, and withdraw immediately afterward. The strategy was the result of a new technology, the helicopter, which resulted in a new form of warfare, the fielding of air cavalry,[1] and was thought to be ideally suited to counter-guerrillajungle warfare. The complementary conventional strategy, which entailed attacking and conquering an enemy position, then fortifying and holding it indefinitely, was known as "clear and hold" or "clear and secure." In theory, since the traditional methods of "taking ground" could not be used in this war, a war of attrition would be used, eliminating the enemy by the use of "searching" for them, then "destroying" them, and the "body count" would be the measuring tool to determine the success of the strategy of "search and destroy."

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The British conducted search and destroy operations in effort to flush out communist insurgents in the jungles during the early years of the Malayan Emergency. The Ferret Force, which was formed in 1948, became an important intelligence provider to the British military. The objective was to contact with native locals and intelligence as to the whereabouts of communist insurgents. With the information the captured persons provided, British troops would use search and destroy as a tactic in effort to flush out the insurgents. Once the communist guerrillas had been flushed out by search and destroy missions, they would be harried by denial of food and medical supplies, perhaps by surrendered enemy personnel willing to cooperate with the British, and eventually induced to surrender, tempted into betrayal, or killed off by a precise military strike, usually an ambush.

In the end, many British officials suspected that the search and destroy worked out poorly because the way it was conducted was in a brutalized way. British troops often set fire to villages accused of supporting the insurgents, detaining thousands of suspected collaborators, and in order to deny the insurgents cover. British units that discovered civilians providing assistance to insurgents were to detain and interrogate them to discover the location of insurgent camps. Insurgents had numerous advantages over British forces; they lived in closer proximity to villagers, they sometimes had relatives or close friends in the village, and they were not afraid to threaten violence or torture and murder village leaders as an example to the others, forcing them to assist them with food and information. British forces thus faced a dual threat: the insurgents and the silent network in villages who, willingly or unwillingly, supported them. While the insurgents rarely sought out contact with British forces, they used terrorist tactics to intimidate civilians and elicit material support.

British troops often described the terror of jungle patrols; in addition to watching out for insurgent fighters, they had to navigate difficult terrain and avoid dangerous animals and insects. Many patrols would stay in the jungle for days, even weeks, without encountering the enemy and then, without warning, insurgents would ambush them. British forces, unable to distinguish from friend to foe, had to adjust to the constant risk of an insurgent attack. Such instances led to the infamous incident at Batang Kali in which 24 unarmed villagers were killed by British troops.[2][3]

Search and destroy became an offensive tool that was crucial to GeneralWilliam Westmoreland’s second phase during the Vietnam War. In his three-phase strategy, the first was to tie down the Viet Cong, the second phase was to resume the offensive and destroy the enemy, and the third phase was to restore the area under South Vietnamese government control. Most Zippo missions were assigned to the second phase around 1966 and 1967, along with clear-and-secure operations.

Search-and-destroy missions entailed sending out platoons, companies, or larger detachments of US troops from a fortified position to locate and destroy communist units in the countryside. These missions most commonly involved hiking out into the "boonies" and setting an ambush in the brush, near a suspected Viet Cong trail. The ambush typically involved the use of fixed Claymore antipersonnel mines, crossing lines of small arms fire, mortar support, and possibly additional artillery support called in via radio from a nearby fire support base.

In February 1967, some of the largest Zippo missions were conducted in the Iron Triangle, between Saigon and Routes 13 and 25. The area had a mass centre of Viet Cong logistics and headquarters, with some of the most high-ranking NLF officials stationed there. The offensive began with Operation Junction City, where the American units assigned had destroyed hundreds of tons of rice, killed 720 guerrillas, and captured 213 prisoners.

However, the number of defenders in the Iron Triangle area was thought to be over 10,000. The offensive failed to destroy the NLF's headquarters or to capture any high-ranking officers and so it had little effect toward Hanoi's plan. Both search-and-destroy and clear-and-hold missions stretched into the third phase, which began in 1968. The number of missions mounted, especially after the US was hit by General Vo Nguyen Giap’s Tet offensive in 1968. As the war grew more aggressive, so did the missions, and search-and-destroy and clear-and-secure operations became merged.

Search-and-destroy missions had many flaws. First, there was lack of distinction between clearing and search-and-destroy missions. Thus, clearing missions, which were less aggressive, eventually morphed into a more violent and brutal form of tactic, just as search-and-destroy missions were. With the lack of distinction between, clearing, and search-and-destroy missions, pacification was not pushed.

Guenter Lewey, a Professor of Political Science at the University of Massachusetts Amherst, argued that the generals and war planners severely underestimated the enemy’s abilities to match and even to exceed US forces.[4] Large numbers of Viet Cong troops would be killed or captured, but they were quickly replaced. Enemy forces were initially pushed out of certain territories, but as soon as the American forces left the areas, they simply returned with more reinforcements and weapons.

The effectiveness of the missions is also doubtful. In one of the first search-and-destroy missions northwest of Dau Tieng, named Operation Attleboro, a US report states that 115 U.S. soldiers were killed, and the North Vietnamese lost 1,062. In Operation Junction City, the report also states that 282 US soldiers were killed, and buf the Viet Cong lost 1,728 guerrillas.

Those estimated figures, however, should be considered in light of the by how they were obtained. They were almost exclusively gathered by indirect means: sensor readings, sightings of secondary explosions, reports of defectors or prisoners-of-war, and inference or extrapolation.[5]